A 20 year old female patient is suspected of having bulimia. Which of the following signs will help confirm the diagnosis?
1. Enamel erosion of maxillary anterior teeth.
2. Enlargement of the thyroid gland.
3. Calluses on the dorsum of the fingers.
4. Bulky clothing to disguise weight loss.

(1) and (3)

All of the above

(1) (2) (3)

(4) only

(2) and (4)